Day Set Point Adjustment; Night Set Point Adjustment - Johnson Controls T-4002 Adjusting Instructions

8. Turn the lower dial to the
desired set point.
9. The difference in the dial
settings is now the
deadband. Remove the
test gage.
T-4110 Set Point
Adjustment (See Fig. 4)
1. Tee the test gage into the
output line.
2. Furnish restricted supply air
to the instrument.
3. Note the ambient
temperature in the space.
4. Move the set point lever to
that temperature.
5. Turn the calibration screw
until the output pressure is at
the mid spring range of the
controlled device.
6. Move the set point lever to
the desired set point.
T-4506 and T-4516
Set Point Adjustment
Usually the day set point is made
on the lower element with a
15 psig (105 kPa) supply
pressure and the night set point
is made on the upper element
with a 20 psig (140 kPa) supply
pressure. If your application is
different, use the proper element
and supply pressure for the
particular application. The
T-4506 is furnished with DAY and
NIGHT labels which can be
applied to the appropriate
element.

Day Set Point Adjustment

(See Fig. 5)
1. Insert the test gage.
2. Furnish 15 psig supply
pressure for day control
(lower dial).
3. Note the ambient
temperature in the space.
4. Turn the lower set point dial
to that temperature.
5. Turn the lower calibration
screw until the output
pressure is at the mid spring
range of the controlled
device.
4 T-4000 Technical Bulletin
6. Turn the lower set point dial
to the desired day set point.

Night Set Point Adjustment

1. Furnish 20 psig supply
pressure for night control
(upper dial).
2. Note the ambient
temperature in the space.
3. Turn the upper set point dial
to that temperature.
4. Turn the upper calibration
screw until the output
pressure is at the mid spring
range of the controlled
device.
5. Turn the upper set point
dial to the desired night set
point.
6. Restore the supply pressure
to the desired cycle.